Performance of different window functions for designing quadrature mirror filter bank using closed form method
Anil Kumar, R. Pooja, Anurag Kumar Singh · International Journal of Signal and Imaging Systems Engineering · 2015
In this paper, a closed form method for designing two-channel linear phase Quadrature Mirror Filter (QMF) bank presented by Kumar et al. is examined and improved by exploiting different window functions for designing the prototype filter for QMF bank. In this method, the optimum pass-band edge frequency is determined via empirical formula instead of using single or multivariable optimisation technique for the given stop-band attenuation and roll-off factor (RF). This method reduces the overall computational time with minimum amplitude distortion to make suitable design of QMF bank for applications, which are carried out in real or quasi-real time. Simulation results presented in this paper how enhanced performance of this algorithm over the other existing algorithms.